Insurance (Details) R$ in Thousands	Dec. 31, 2018 BRL (R$)
Insurance
Maximum indemnity limit for material assets	R$ 7,520,000
Civil liability of Directors and Officers (D&O), insured amount	100,000
General civil liability, insured amount	R$ 5,500

The amount security or protection against a loss or other financial burden for material assets.

No definition available.

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Namespace Prefix:	suzby_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant